Mortar hawk



July 5, 1932. BYHRE y 1,865,885

MORTAR HAWK Filed April 2. 1928 Patented July 5, 1932 arras STATESPATENT. oFFlcE JACOB BYHRE, or CHICAGO, ILLINOIS MORTAR HAWK Applicationsied April 2, 192s. seriai No. 266,759.

which will render it stiff and resistant against pressure and warpingstrains.

Another object of the invention is to secure in the novel design of theplate a suiicient body with a minimum thickness of material, therebyreducing the weight of the structure. y

A final, but nevertheless important object of the invention is toincorporate in the novel hawk a brace for the plate and a protectingelement for the handle.

With the above objects in view and any others that may suggestthemselves in the specification and claims to follow, a betterunderstanding of the invention may be gained by reference to theaccompanying drawing, in which- 80 and Fig. 2 is a vertical crosssection of the same, centrally taken.

Figure 3 is an elevational view showing the 85 hawk deposited on a fiatsurface when not in use.

lt has been my observation that hawks of the prevalent type have atendency toward weight, making the support of the same in 0 the handtedious and tiresome. Also, the flat nature of the conventional hawkplate subjects it to warping when deposited on a hard surface when thehawk is laid aside, so that in time the edges of the hawk dip at one 4 5place or another with the effect of hasten' ing the sliding and droppingof material deposited on the hawk plate. Further, hawk plates in thestandard structures are not suiiiciently braced to stand rough usage,and

much annoyance is sufered by the worker in Figure 1 is a plan view ofthe novel hawk;

the use of the implement. It has been my intention to eliminate thedeficiencies related above in connection with implements of this nature,and attain the objects above-outlined. to their fullest extent.

Referring specifically to the drawing, 5 denotes the plate of the novelhawk, which is villustrated with a square outline, although the latterneed not necessarily be of such form; in other words, the hawk may beround or of any other contour that may be found desirable.

The plate 5 is of pressed or rolled alumi` num for purposes orlightness, although any other suitable metalfmay be used for the' Vsame. The plate has a slight but easily perceptible concavity, asapparent in Figure 2, and is adapted to rest with its central portion inthe concavity of a brace pad 6. This pad is an aluminum casting, and hassuii-L cient body to afford a rigid and stable seat to the plate 5. Forpermanency, the plate and the pad are soldered, point-fused or rivetedto one another. In the last connection I have shown the rivets as studs7 projecting from the pad 6 through holes in the plate 5. These holesmay be counter-sunk, and the rivets hammered wide to fill the holes andserve as positive retainers for the plate. The

illustration of the rivets is merely made to` y indicate one positivemode of connecting the plate to the pad; of course, any othersuitl able'means' may be used to make a positive connection, if found advisable. YIt will be noted that the receptacle plate is provided with a centralaperture to receive one of the integral studs or rivets of thesupporting pad 6. The provision of this centrally riveted connection isan important feature in that the working forces imposed on the vedges ofthe plate exert a leverage on the outer edges of the sup-porting padwhich tend to cause the central portion of the plate to bulge or popupwardly when in use. To. prevent thisthe central rivet is provided toresist the stresses caused by the working forces imposed on the edges ofthe plate.

The pad 6 has a depending reduction 8, which receives the wood handle 9from be.-`

ylow., Thereduction 8 is tapped tohreceive extent that it may be madethinner without the threaded upper end 10 of a screw 1l, which isdirected axially through the handle from below. An aluminum collar 12 ismounted on the screw shank between the 5 head lla of the screw and thebot-tom of the 10 clean and unsoiled by plaster or other materialdeposited on such surfaces, as shownY in Figure 3 of the drawing.

By constructing the hawk plate concave, I secure first the stiffness ofa plate ofthis shape as against a flat plate. The plate is thusprotected against warping from striking objects tending to deform it,the resistance being greater against tendencies to warp the plate awayfrom the material. The plate is thus tendency to collect the material orretain the same within it rather than permit it to slide or drop olf atthe edges. By designing the plate with the concavo-convexcharacteristic, it assumes a hard degree of stiifness to the sacrificingits strength, thereby saving 'weight and material. Further, the pad 6constitutes a reinforcement and rigid sup- 30 port for the hawk. It willbe noted that this pad has a tapered outer extremity, as indicated at6a, such extremity gradually meeting the underside of the plate 5. Bymeans of 'this extremity, the plate is supported a maximum distance fromthe center of the implement; yet, the pad does not extend in fullthickness through this distance, but is chamfered for the extremity 6ato reduce material and weight without sacrificing area of support. Also,the tapered joint of the pad with the plate makes for a smoothconnection.

It will thus be seen that I have provided a hawk which combinesstrength, lightness and eiciency. The device. is durable against keepsits shape at all times. It is carried easily, has not delicate parts orjoints to loosen or get out of order, and enables the worker to handleit without discomfort.

I claim l. A plasterers hawk including a receptacle plate sunkeninwardly of its marginal edges, a supporting pad interlocked thereto onthe side opposite said sunken portion, the latter having its marginextended with a thickness reduction, a handle, and an extension of thepad positioned within the handle.

2. .A plasterers hawk comprising a receptacle plate having asubstantially uniform concaved receiving face for the purpose ofstiflening the hawk, and a handle projecting from its other face andsubstantially centered with respect to the concavity.

3. A plasterers hawk comprising a recep- Y 55 tacle plate, alongitudinally extending hanin the nature of a receptacle, which has a`the rough usage to which it is subjected, and

dle secured substantially centrally of said plate, and a reducedextension carried by the end of the handle, said extension being adaptedto retain the handle out of contact with surfaces on which the hawk maybe deposited.

4:. A plasterers hawk comprising a receptacle plate having asubstantially uniform concaved receiving face for the purpose ofstiifening the hawk, said receptacle plate having a plurality of spacedapertures therein, one of said apertures being disposed centrally ofsaid concavity, a supporting pad secured to the other face of saidreceptacle plate, a plurality of projections extending from said pad andriveted within said apertures to supplement the stiffening action ofsaid plate, and a handle secured centrally of said supporting pad. u

In testimony whereof I affix my signature.

JACOB BYHRE.

